PC-Progress Discussion Forums

That’s a correct behavior of the software. From your posts, it is clear to me that you are completely new to HYDRUS-1D. You should do some of the tutorials posted on the HYDRUS-1D website (http://www.pc-progress.com/en/Default.aspx?h1d-tutorials) or from the CSIRO Tutorial eBook: https://www.pc-prog...

I do not understand what exactly you want to do. However, all input and output files in HYDRUS-1D as text files and it should be easy to open them with any text editor or Excel. Their detailed description can be found in the Technical manual, which you can from the Help menu. J.

Indeed, that’s how one can get the length of a meshline, i.e., displaying some property along a cross-section (i.e., meshline), and displaying “displayed” chart data. The meshline is defined strictly along element sides from point to point. The “boundary length” may be slightly different since the e...

I think you need to use the same units as the units in the Freundlich isotherm are as follows: where subscripts c, s, and w stand for contaminant, soil, and water, respectively.

J.

I think that concentrations can go up only due to the following processes that can be considered in HYDRUS: evaporation, root water uptake, production, or desorption from the nonequilibrium phase (immobile water of kinetic sorption sites). J.

I do not have any. I never use any other SH functions than from my dear mentor (VG) . J.

When calculating the units of the retardation factor for nonlinear sorption, you need to take into account the fact that the distribution coefficient ks relating the solution and adsorbed concentrations has units for linear sorption of [L^3/M] and for nonlinear Freundlich sorption, they are [L^(3β) ...

If you get different profiles for the VG and BC models, it is likely related with how these two models describe soil hydraulic properties at the dry end, when the vapor flow becomes important. You should look into that. I do not have time to look at your projects (I’m too busy with teaching now when...

We do not print to the output, or even calculate internally, the length of the meshline. We do no need it for the calculations. If you want to calculate it, you would need to do it from the coordinates of the nodes that define the meshline. J.

Unless the emitter is circular around the tree, you cannot simulate this system as an axisymetrical system. You need to either assume a 2D domain with symmetry around the vertical axis, or you need to simulate this as a fully 3D domain. J.

It is not. If you have a plume, it likely spreads more in the longitudinal direction than in the perpendicular direction. You need to constrain the optimized parameters. J.

You post is not completely clear to me. On the one hand, you write that you are using an axially symmetric domain, but also that the dripper is 1.5 m from the trunk. That would imply that the emitter is a circular drip line with a radius of 1.5 m. Is that so? When you use radially symmetric domain, ...

You need to specify cValue1, 2, or 3 in “Time-Variable Boundary Conditions” and then select the “Pointer to the vector of boundary conditions” (selecting cValue1, 2, or 3) when assigning Solute Transport BC on the boundary. J.

If the groundwater table is within the simulated soil profile, then the bottom pressure head (positive) gives you the information about its position. J.

Great to hear that. Good luck. Jirka